sendmail-spamblock

[ck]

i'm looking at all the options. currently i'm rejecting and discarding via
access. i'm considering a perl script that filters headers.  i'll check out
the stuff in the postings. 

thanks for the input 


----------
>From: Darin Perusich <Darin.Perusich at cognigencorp.com>
>To: nflug at nflug.org
>Subject: Re: sendmail/spamblock
>Date: Thu, Mar 27, 2003, 1:34 PM
>

>i agree fully, blocking spam is like baking a big layer cake. you need 
>to keep adding different facilities until you reach the desired outcome. 
>the dnsdb is something that can be done rather quickly without to much 
>testing.
>
>John Seth wrote:
>> using the below mentioned enhancement to sendmail is good.  However, in
>> my own experience, depending on the orbs' lists' you setup, you could be
>> checking for open relays only, and not necessarily spam.  My system got
>> so complex adding over 100+ orbs-type lists, that we went to
>> spamassassin, running as a daemon.  Other things we've done is block
>> some domains in sendmails access lists which become a known nuisance.
>> Lately, we've been hit by some system in Colorado spamming us with over
>> 120 servers, at over 500msg's per minute, and we've ended up blocking
>> them from out network on the router level.  Less traffic inside our
>> network ;)
>> 
>>   - Tony
>> 
>> ----- Original Message -----
>> From: "Darin Perusich" <Darin.Perusich at cognigencorp.com>
>> To: <nflug at nflug.org>
>> Sent: Thursday, March 27, 2003 12:23 PM
>> Subject: sendmail/spamblock
>> 
>> 
>> : *** taken from a earlier message **
>> :
>> : I have sendmail issues on a BSD Unix
>> : machine. Can't seem to keep a lid various spam issues. Can the
>> : sendmail/spamblock major domo in this group give me some tips and
>> tricks
>> : and/our point me to some resources?
>> :
>> : *** taken from a earlier message **
>> :
>> : have you tried enabling sendmails dns blacklist feature? after
>> enabling
>> : this the amount of spam traffic was greatly cut down. just add
>> : FEATURE(dnsbl,`relays.ordb.org', `Rejected - see http://ordb.org/') to
>> : you sendmail mc and rebuild the config. there are a number of free
>> : blacklist's avialable, i forget why i chose ordb over the others.
>> :
>> : before doing this make sure that your domain is NOT on that
>> blacklists!!
>> : you can do a lookup at any of these site.
>> :
>> : --
>> : Darin Perusich
>> : Unix Systems Administrator
>> : Cognigen Corp.
>> : darinper at cognigencorp.com
>> :
>> :
>> :
>> 
>> 
>> 
>> 
>
>
>-- 
>Darin Perusich
>Unix Systems Administrator
>Cognigen Corp.
>darinper at cognigencorp.com
>
>